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An overhead glimpse inside the thermal vacuum chamber at NASA's Goddard Space Flight Center in Greenbelt, Md., as engineers ready…
Twilight, noctilucent clouds and aurora viewed on June 9, 2013 from Alberta, Canada.
Portrait of new astronaut candidate Victor J. Glover.
Portrait of new astronaut candidate Christina M. Hammock.
Portrait of new astronaut candidate Christina M. Hammock.
Portrait of new astronaut candidate Jessica U. Meir.
Portrait of new astronaut candidate Jessica U. Meir.
Portrait of new astronaut candidate Andrew R. Morgan.
Portrait of new astronaut candidate Andrew R. Morgan.
Portrait of new astronaut candidate Josh A. Cassada.
